Deflector



II II J. A. M CRARY DEFLEQTOR Filed June 8, 1932 (NVZNTOR Joy/v 4 Ms 0941?) BY 9. ATTORNEY Aug. 15, 1933.

PatentedMAug. 15, 1933 h 1 UNITED] STATES. PATENT OFFICE DEFIQECTOR j I John A. McCrary, Seminary Hill, Application Junez8, 1932. SerialNo. 616,089

' 6 Claims. (01. 20-405] (Granted under the Actof March 3, 1883, as 5 amended April30, 1928; 370' G. 757) i My invention relates to and has for an object the provision of ameans whereby a clearand unobstructed vision-may be had froma pilot house of a ,vessel, anaircraft, a train or motor vehicle while in motion or standing still. This object is accomplished by providing a high velocity stream of air behind which the observer may stand, the stream of air being directed across his line of vision in such a way that rain, hail, snow, sleet or high winds-will be deflected from their course and in this way not be driven into indicates the pilot house of a vessel formed by the floor A, walls B and ceiling C, and around which an air conduit 2 is constructed. This conduit passes completely around the pilot house except i at the window opening 3 where it terminates at v one end in nozzle 4 and at the other end in mouth 5, which is considerably larger in crosssection than the nozzle. The conduit is arranged and proportioned to cause a relatively low velocity of air now therethrough, and the nozzle 4 is relatively smaller in cross-section as compared to the crosssection of the conduit in orderto produce high velocity of air flow at the window opening. The end 5 of the conduit is designed to provide a window pocket to receive'a window 6 that slides therein to vary or close the window opening. A fan or blower 7, driven by motor 8 or any other suitable powergis mounted in the conduit to cause a continuous circulation therethrough in the direction indicated by the arrows, and suitable vanes 9 are arranged at the corner turns of the conduit to direct the air currents therearound. The air thus circulating through the conduit is forcibly ejected by the nozzles downwardly across the window opening deflecting rain, hail, snow, sleet or high winds, or combinations of any of them, from their course, thus protecting the face and eyes of an observer who otherwise would be subjected to inconvenience and discomfort.

, .Any water or snow that may enter the mouth 5 of the conduit 2 will be trapped in the pocket aperture closing means movable in the other terr 10, the cross-section of whichis relatively larger than that of theconduit itself, and be carried off I through thedrain 11. Staggered baiiles 12 ar-- ranged in the conduit, deflect and trapany of the water that. might tend to pass through the 0- conduit and be carried intothe fan. Thesloping bottom 13v also assists in preventing water from passing to the fan.

Although I have shown my invention in con-- nection withthe pilot house of a vessel, it is obvious that with. but minor installation changes it is equally applicable to the cabin of an aircraft,

,a motor vehicle, a railroad train or an engine, and it is further to be understood that the nozzle 4'may be so placed that the stream of air issuing 791-7 therefrom will be projected against the exterior. side of a closed window or windshield instead of across the window opening to drive away rain or snow and to prevent ice formation on the window in extremely cold weather. In the latter case, it might be desirable to eject heated air from the nozzle.

It will be understood that the above description and accompanying drawing comprehend 0 only the general and preferred embodiment of my invention, and that various changes in details of construction, proportion and arrangement of parts may be resorted to within the scope ofthe appended claims without sacrificing i any of the advantages of this invention.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes, without the payment of any royalty thereon.

What I claim as new is:

1. In combination with a carrier having a compartment with an optical aperture, an air system I for directing a stream of air of high velocity downwardly across said aperture, said system ineluding a conduit of varying cross-section, said conduit terminating on either side of the aperture, means in said conduit for the collection and discharge of entrained water, and means for 'producing a circulation of air through the conduit.

2. In combination with a carrier having a compartment with an optical aperture, an air system for directing a stream of air of high velocity downwardly across the aperture, said system including a conduit terminating on either side of the aperture, said terminals being in alignment with each other, a nozzle of smaller cross-section than the conduit secured to one terminal, an

within the conduit for producing a circulation of 7 air therethrough, air-guiding vanes' at the changes in direction of the conduit, and means for the collection and discharge of entrained water.

4. In combination with a carrier provided with an optical aperture, an air system for providing clear vision through the aperture, said system in cluding a conduit having terminals of different cross-sections, one of which isfsmaller than the cross-section of the conduit, a fan in the conduit for producing a circulation of air therethrough,

air-guiding means in the conduit, means for the collection and discharge of entrained water, baffles to eliminate the passage of the entrained water into the conduit, and a sloping conduit wall between the baffles and fan".

5. In combination with a carrier having a compartment with an optical aperture, an air system for directing a stream of high velocity air down- Wardly'across said aperture, said system including a conduit of varying cross-section having its terminals on opposite sides of the aperture, a restricted nozzle at one terminus of the conduit, the other terminus providing means for collecting foreign matter displaced by the high velocity air ejected from the nozzle, said collecting means being disposed in alignment with the nozzle, means for the discharge of said foreign matter from the conduit, and means for producing a circulation of air under pressure through the conduit.

6. In combination with a carrier having a compartment with an optical aperture, a system for directing high velocity air downwardly across the aperture, said system including a conduit terminating on opposite sides of the aperture, the terminals of said conduit being disposed in alignment with each other whereby air ejected from one terminus will be received by the other terminus, and means for producing a circulation of air through the conduit.

JOHN A. MCCRARY. 

